Modeling astrometric time series of the Gaia BH3 system with exoplanet package (https://github.com/exoplanet-dev/exoplanet).
The astrometric time series data "epochast.dat" was obatined from https://github.com/esa/gaia-bhthree.
Please reference the discovery paper by Gaia Collaboration, Panuzzo, et. al. 2024 "Discovery of a dormant 33 solar-mass black hole in pre-release Gaia astrometry" (https://zenodo.org/records/10977502).